Of course, with bolts and nuts to connect the surface, the surface of the workpiece needs to be punched, which increases the stress concentration in the workpiece and has the possibility of damaging the part, especially in the perforated part, which is a disadvantage of screw connection.And is considered a nut.
Bolts and nuts are produced according to various standards, each of which is applicable to a specific industry.Industrial bolts and nuts have completely different standards from pointed bolts, drill bits, grids and wood bolts, and they are also produced in different grades.Two types of gears can be used for industrial bolts and nuts. Coarse threaded coarse gears use the most fine teeth in connections and fine gears: they are only used for high-grade steel bolts and nuts and can be smoothed at the bottom of the grade and these ribs may be lost.
In the past, industrial bolts were either produced in the form of hexagonal bolts or in the form of female bolts, which were actually a full-threaded or full-gear rod.The screw core of the hexagonal bolt has a certain and equal length along the screw, and the outer diameter is measured from the outer rib.A new type of industrial bolts and nuts are called hexagon socket screws. It has a more modern design than hexagon screws. It has gradually found a broad space in industry and today on many industrial machines, especially because of its convenient connection.Below we review the most widely used industrial bolt and nut standards.
Industrial bolts and nuts come in different grades, usually made of iron, steel and stainless steel grades.Iron bolts and nuts produced in grades 4.8 and 5.6 have low carbon content, are soft and ductile, and are usually sold in the form of cold galvanized silver plating.Steel bolts are actually the most widely used type of industrial bolts and are used in the following grades.
Stainless steel bolt grades are also used in industries where the tensile strength is lower than that of steel bolts, that is, the tensile strength in the industry is equal to 700 N/m2, especially in industries that are exposed to corrosive gas under humid conditions.There are two functional grades of steel bolts, one is grade 304, called A2, and the other is grade 316, called A4.
Post time: Dec-23-2021
